Hydrogen Gas Supply Using Pressure-Specific Compressors
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Solution Overview
Problem
Existing hydrogen gas supply systems face challenges in stably compressing hydrogen at both low and high pressures while maintaining reliability, particularly due to limitations in flow rate and wear issues with hydraulic compressors and piston crank type compressors at high pressures.
Innovation Solution
A hydrogen gas supply method and system utilizing a combination of piston crank type compressors for low-pressure regions and hydraulic or diaphragm type compressors for high-pressure regions, with shared electric motors and clutch control to manage compressor operation based on pressure requirements, allowing for stable hydrogen supply through direct or differential pressure filling methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a hydraulic compressor is used to compress hydrogen to high pressure, then the compression capability is improved, but the service life of wear parts decreases and reliability deteriorates
Solution Approach 1:
The compression process is divided into two distinct stages: a first compression stage using a piston crank type compressor for low-pressure compression, and a second compression stage using a hydraulic compressor for high-pressure compression. This segmentation allows each compressor type to operate within its optimal pressure range, preventing the piston crank compressor from experiencing excessive wear at high pressures while maintaining efficient compression capability.
2Productivity
If a piston crank type compressor is used to compress hydrogen at high pressure, then the flow rate is improved, but the service life of wear parts decreases
Solution Approach 1:
The compression process is segmented into two stages with different compressor types optimized for different pressure ranges. The piston crank type compressor handles the first stage at lower pressures where it can achieve high flow rates without excessive wear, while the hydraulic compressor handles the second stage at high pressures where flow rate is less critical than reliability.
3Device complexity
If a single compressor type is used for both low-pressure and high-pressure compression, then the device complexity is reduced, but the overall reliability and efficiency deteriorate
Solution Approach 1:
The system is segmented into two compression stages with different compressor types, each optimized for its specific pressure range. This segmentation improves reliability and efficiency by preventing wear parts from operating under suboptimal conditions, while the use of a shared driving shaft and common control system minimizes the additional complexity that would otherwise result from having completely separate compression systems.
4Stress or pressure
If the piston crank type compressor operates at high pressure, then the compression ratio is improved, but the wear of compression parts increases
Solution Approach 1:
The compression process is segmented into two stages: the first stage uses a piston crank type compressor to achieve moderate compression at lower pressures where wear is minimized, and the second stage uses a hydraulic compressor to achieve the final high compression ratio at high pressures where the piston crank compressor would otherwise suffer excessive wear.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system ensures stable and reliable hydrogen supply at both low and high pressures, reducing wear and power consumption, and enabling efficient filling of hydrogen storage tanks with a large flow rate, enhancing customer satisfaction and system reliability.
Implementation Method 1
the low-pressure compressor is a piston crank type compressor
Implementation Method 2
the high-pressure compressor is a hydraulic compressor or a diaphragm type compressor... the hydraulic compressor has a mechanism in which a piston is driven by a hydraulic force of hydraulic oil
Implementation Method 3
the high-pressure compressor is a hydraulic compressor or a diaphragm type compressor
Data Source
AI summary
A hydrogen gas supply method and the hydrogen gas supply system is provided, including a low-pressure compressor 1 and a high-pressure compressor 2 that compress hydrogen gas, in which a necessary pressure at a supply destination includes a low-pressure region and a high-pressure region and the hydrogen gas is supplied to the supply destination in accordance with the necessary pressure. The low-pressure compressor 1 is a piston crank type compressor. The high-pressure compressor 2 is a hydraulic compressor or a diaphragm type compressor. When the necessary pressure at the supply destination is in the low-pressure region, the hydrogen gas compressed by the low-pressure compressor 1 is supplied to the supply destination.